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- 'use strict';
- var GetIntrinsic = require('get-intrinsic');
- var $EvalError = GetIntrinsic('%EvalError%');
- var DaysInYear = require('./DaysInYear');
- var YearFromTime = require('./YearFromTime');
- // https://262.ecma-international.org/5.1/#sec-15.9.1.3
- module.exports = function InLeapYear(t) {
- var days = DaysInYear(YearFromTime(t));
- if (days === 365) {
- return 0;
- }
- if (days === 366) {
- return 1;
- }
- throw new $EvalError('Assertion failed: there are not 365 or 366 days in a year, got: ' + days);
- };
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